Circuit Description
The driver door lock switch lock and unlock signal circuits provide inputs to the driver door switch assembly (DDSA) when the driver door lock switch is activated to the Lock or Unlock position. These inputs allow the DDSA to detect a door Lock or Unlock request. The DDSA provides power to the driver door lock switch. When the door lock switch is activated to the Lock or Unlock position, ground is supplied by G201. When the DDSA detects low voltage on a signal circuit, the DDSA will send a message on the class 2 serial data line to the remote control door lock receiver (RCDLR) to enter the power door latches in Lock or Unlock status. The DDSA monitors the signal circuits to determine how long the ground has been applied. For more detailed information concerning power door lock operation refer to Power Door Locks Description and Operation .
DTC Descriptors
This diagnostic procedure supports the following DTCs:
| • | DTC B3142 Driver Unlock Switch Circuit Low |
| • | DTC B3152 Driver Lock Switch Circuit Low |
Conditions for Running the DTC
Battery voltage must be between 9.0-16.0 volts.
Conditions for Setting the DTC
| • | The DDSA detects a short to ground on the driver door lock switch lock or unlock signal circuit. |
| • | Condition must be present for greater than 30 seconds. |
Action Taken When the DTC Sets
Stores DTC B3142 or B3152 in DDSA memory.
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | You issue a scan tool CLEAR DTCs command. |
Diagnostic Aids
| • | The following conditions may cause an intermittent malfunction: |
| - | There is an intermittent short to ground in the driver door lock switch lock or unlock signal circuit. |
| - | The driver door lock switch is shorted to ground internally or is sticking. |
| - | The driver door lock switch was pressed for longer than 30 seconds. |
| • | Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Door Lock/Indicator Schematics and Door Control Module Schematics Connector End View Reference: Power Door Systems Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the scan tool display Idle? | Go to Step 3 | Go to Step 4 |
3 |
Does the door lock switch parameter change state? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 6 |
4 |
Does the scan tool display Idle? | Go to Step 7 | Go to Step 5 |
5 | Test the appropriate driver door lock switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the DDSA. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the driver door lock switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 |
8 | Replace the DDSA. Refer to Front Door Switch Replacement . Did you complete the replacement? | Go to Step 10 | -- |
9 | Replace the driver door lock switch. Refer to Front Door Switch Replacement . Did you complete the replacement? | Go to Step 10 | -- |
10 |
Does the DTC reset? | Go to Step 2 | System OK |
